EFFECT OF SLIP VELOCITY AND BEARING DEFORMATION ON THE PERFORMANCE OF A MAGNETIC FLUID BASED ROUGH POROUS TRUNCATED CONICAL PLATES

An attempt has been made to discuss the behaviour of a magnetic fluid based squeeze
film between rough porous truncated conical plates by taking into consideration the effects of
bearing deformation and slip velocity. Taking recourse to a different type of probability density
function, the model of Christensen and Tonder has been adopted to evaluate the effect of
transverse surface roughness and the concern stochastically averaged Reynolds’ type equation has
been solved to derive the expression for pressure distribution. This results in the calculation of
load carrying capacity. The graphical representations make it clear that although the combined
effect of bearing deformation and slip velocity is relatively adverse the magnetic fluid lubricant
saves the situation to a limited extent, at least in the case of the negatively skewed roughness. For
an overall improvement of performance of bearing system, the slip parameter should be
minimized. A suitable combination of aspect ratio and semi vertical angle may lead to some
compensation for negative effect of deformation, especially when variance (negative) is involved.